Auto diagnostic tool



FIG. 1 is a first perspective view of an auto diagnostic tool showing my design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines shown in the drawings depict portions of the auto diagnostic tool in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for an auto diagnostic tool, as shown and described. 